Switching the uniaxial magnetic anisotropy by ion irradiation induced compensation

Abstract

In the present work, the uniaxial magnetic anisotropy of GaMnAsP is modified by helium ion irradiation. According to the micro-magnetic parameters, e.g. resonance fields and anisotropy constants deduced from ferromagnetic resonance measurements, a rotation of the magnetic easy axis from out-of-plane [0 0 1] to in-plane [1 0 0] direction is achieved. From the application point of view, our work presents a novel avenue in modifying the uniaxial magnetic anisotropy in GaMnAsP with the possibility of lateral patterning by using lithography or focused ion beam.

New magnetic states in nanorings created by anisotropy gradients

“…Recently, a large effort has been made to create novel materials with variable magnetic anisotropy, in which the anisotropy could be controlled by electric field [28][29][30], temperature [31][32][33], and ion implantation [34][35][36]. Moreover, it has been shown that reversal magnetization, and domainwall movement can be controlled by a defined perpendicular anisotropy gradient in Co/Au multilayers using He+ ion-bombardment through a wedged Au stopped layer [37].…”

Hole compensation effect in III-Mn-V dilute ferromagnetic semiconductors

“…Interestingly, HC exhibits totally different dependence when DPA raises: it rises and decreases monotonically for (Ga,Mn)As and (Ga,Mn)P, respectively, while for (In,Mn)As it shows a maximum value of around 300 Oe. However, it is worth to mention that a switching of the magnetic anisotropy does not appear here [32,33]. stabilization energy (dash line) for (Ga,Mn)P, (Ga,Mn)As, and (In,Mn)As relative to the vacuum level [20].…”

Proton-fluence dependent magnetic properties of exfoliable quasi-2D van der Waals Cr2Si2Te6 magnet

“…This same result is also observed for the irradiated samples, providing evidence that the easy axis remains stable despite a decrease in the magnetization. The H//c measurement for the irradiated sample (figure 2(b)) shows a large bifurcation between the FC and ZFC curves at low temperatures (T < 30 K) that is not present in the pristine magnetization (figure 2(a)), suggesting alterations to the magnetic anisotropy of irradiated CST, potentially due to the change in the magnetic exchange coupling upon proton radiation [27][28][29][30]. In contrast, the H//ab magnetization data is similar in both samples, indicating that the applied field is too small to accurately detect any anisotropic effects in this direction, although this observation may also be due to the spin glass behavior.…”